Harley Engine
Harley Bike Engine Parts at JJ Motorsports
Rebuild and boost your Harley's engine with premium parts from JJ Motorsports. Our inventory features complete gasket sets, piston kits, oil filters, pushrod tubes, and coolers designed for maximum strength, leak-free sealing, and high-performance in extreme conditions. Compatible with Big Twins, Softail, Touring, and more, these components support top-end overhauls, oil management, and durability for street rides or custom builds.
Shop trusted brands like Drag Specialties for magnetic filters and Wiseco for forged pistons. Explore related categories such as Harley air and fuel for carb tuning or Harley drivetrain for transmission upgrades.
Top Harley Engine Products
- DRAG SPECIALTIES Magnetic Ring Oil Filter - Chrome - 3-1/4" 140003HP-BX18 – Captures metal particles with pressure relief.
- WISECO Piston Kit .010 .883 XL K1656 – Forged aluminum with rings, pins, and circlips for rebuilds.
- DRAG SPECIALTIES Pushrod Tube Kit Big Twin 75711 – Includes tubes, clips, cups, and springs for complete engine.
- ULTRACOOL Below Regulator Mount Oil Cooler Stainless Steel RF-2CSS – Fits S&S 111/124/143 engines with machined adapter.
- PAUGHCO Ribbed Teardrop Air Cleaner 701-200 – Chrome-plated aluminum with mini filter.
Browse our in-stock inventory below with same-day shipping and expert support. Questions? Contact us for fitment advice!
- Product
- Qty in Cart
- Quantity
- Price
- Subtotal
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DRAG SPECIALTIES Points Cover - Chrome 78040
DRAG SPECIALTIES
$25.70A points cover serves as both a functional ignition component protector and a visual statement on your engine bay. This Drag Specialties chrome piece combines corrosion resistance with a polished finish that complements any classic or custom build. If...09401612- SKU:
- 09401612
- Availability:
- Ships Same Business Day
- Weight:
- 0.25 LBS
- RIDING STYLE:
- STREET
- STYLE:
- BLACK SKULL
- TYPE:
- POINTS
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- COVER
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
$25.70 -
DRAG SPECIALTIES Points Cover - Chrome 78102
DRAG SPECIALTIES
$25.70A points cover does more than protect your ignition system—it completes the visual package of a custom build while safeguarding critical engine components from debris and moisture. If you're running Drag Specialties' Split Skull aesthetic across your...09401743- SKU:
- 09401743
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- RIDING STYLE:
- STREET
- STYLE:
- BLACK SKULL
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- COVER
- TYPE:
- POINTS
- UNITS:
- EACH
- COLOR/FINISH:
- CHROME
- STYLE:
- SKULL
$25.70 -
DRAG SPECIALTIES Points Cover - Black 78102B
DRAG SPECIALTIES
$25.70Keep your ignition system protected while maintaining a cohesive aesthetic with quality hardware. A points cover isn't just functional—it's a visible component that deserves the same attention to detail as the rest of your build. This die-cast cover...09401744- SKU:
- 09401744
- Availability:
- Ships Same Business Day
- Weight:
- 0.16 LBS
- COLOR/FINISH:
- BLACK
- MATERIAL:
- DIE-CAST
- PRODUCT NAME:
- COVER
- STYLE:
- CHROME SKULL
- TYPE:
- POINTS
- RIDING STYLE:
- STREET
- STYLE:
- SKULL
- UNITS:
- EACH
$25.70 -
DRAG SPECIALTIES Heavy Duty Motor Mount - FXR 74806
DRAG SPECIALTIES
$47.33Engine vibration and movement can compromise your chassis geometry, transmission alignment, and overall drivetrain longevity—especially under hard acceleration or sustained performance driving. Heavy-duty motor mounts isolate these vibrations while...DS243606- SKU:
- DS243606
- Availability:
- Ships Same Business Day
- Weight:
- 1.15 LBS
- RIDING STYLE:
- STREET
- COLOR/FINISH:
- CHROME
- MOUNTING POSITION:
- TOP
- PRODUCT NAME:
- MOUNT
- TYPE:
- MOTOR
- UNITS:
- KIT
$47.33 -
DRAG SPECIALTIES Top Motor Mount 19092
DRAG SPECIALTIES
$41.15A worn or failing motor mount compromises engine stability, increases vibration transmission to the chassis, and can lead to premature wear on surrounding components. The Drag Specialties Top Motor Mount 19092 delivers solid engine support with a...DS243615- SKU:
- DS243615
- Availability:
- Ships Same Business Day
- Weight:
- 0.63 LBS
- PRODUCT NAME:
- MOUNT
- UNITS:
- EACH
- MOUNTING POSITION:
- TOP
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- TYPE:
- ENGINE
$41.15 -
DRAG SPECIALTIES Top Motor Mount 74021
DRAG SPECIALTIES
$39.09Engine movement under hard acceleration creates vibration that transfers through your chassis, robbing you of precision handling and accelerating wear on surrounding components. The Drag Specialties Top Motor Mount 74021 isolates that vibration with a...DS243602- SKU:
- DS243602
- Availability:
- Ships Same Business Day
- Weight:
- 0.94 LBS
- PRODUCT NAME:
- MOUNT
- TYPE:
- ENGINE
- UNITS:
- EACH
- BASE FINISH:
- CHROME
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- TOP
$39.09 -
DRAG SPECIALTIES Heavy Duty Motor Mount - Softail 74807
DRAG SPECIALTIES
$68.96Stock motor mounts on Softail models can flex under hard acceleration and engine vibration, leading to premature wear and misalignment issues that compromise performance and longevity. These DRAG Specialties heavy-duty mounts eliminate that movement with...DS243607- SKU:
- DS243607
- Availability:
- Ships Same Business Day
- Weight:
- 1.81 LBS
- PRODUCT NAME:
- MOUNT
- TYPE:
- MOTOR
- UNITS:
- KIT
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- TOP
$68.96 -
DRAG SPECIALTIES Gasket Board - 6 Speed 0934-6982
DRAG SPECIALTIES
$129.73A properly sealed transmission is non-negotiable for reliable power delivery and longevity in any high-performance application. The DRAG SPECIALTIES Gasket Board for 6-speed transmissions provides OEM-equivalent sealing surfaces, preventing fluid leakage...09346982- SKU:
- 09346982
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
- UNITS:
- EACH
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- GASKET BOARD
- STYLE:
- 6 SPEED
$129.73 -
DRAG SPECIALTIES Gasket Board - 6 Speed 0934-6983
DRAG SPECIALTIES
$117.37A worn or degraded gasket board compromises transmission sealing, leading to fluid leaks, contamination, and potential drivetrain failure—especially critical in high-performance 6-speed applications where precision tolerances demand reliable sealing. The...09346983- SKU:
- 09346983
- Availability:
- Ships Same Business Day
- Weight:
- 4.00 LBS
- PRODUCT NAME:
- GASKET BOARD
- RIDING STYLE:
- STREET
- STYLE:
- 6 SPEED
- UNITS:
- EACH
$117.37 -
DRAG SPECIALTIES Gasket Board - XL 0934-1878
DRAG SPECIALTIES
$160.63If you're running a professional shop or serious home garage, keeping XL Evolution gaskets, seals, and O-rings organized and accessible is non-negotiable. This display board eliminates the guesswork when sourcing rebuild components—everything you need is...09341878- SKU:
- 09341878
- Availability:
- Ships Same Business Day
- Weight:
- 7.05 LBS
- PRODUCT NAME:
- DISPLAY BOARD
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- GASKET
$160.63 -
DRAG SPECIALTIES Flange Adapter 289219
DRAG SPECIALTIES
$43.76If you're running an early Evolution engine with a two-bolt flange manifold, you're limited by carburetor options—until now. This adapter bridges the gap between your classic platform and modern late-model CV or Mikuni HSR-42 carburetors, giving you...DS289219- SKU:
- DS289219
- Availability:
- Ships Same Business Day
- Weight:
- 0.35 LBS
- RIDING STYLE:
- STREET
- PRODUCT NAME:
- FLANGE ADAPTER
- UNITS:
- EACH
- MATERIAL:
- ALUMINUM
$43.76 -
DRAG SPECIALTIES Cam Cover - Twin Cam 25247-99
DRAG SPECIALTIES
$125.61A properly sealed cam cover is critical for preventing oil leakage and maintaining engine cleanliness on Twin Cam motors. The DRAG SPECIALTIES Cam Cover 25247-99 delivers OEM-equivalent fitment and sealing performance without the premium price tag,...09400438- SKU:
- 09400438
- Availability:
- Ships Same Business Day
- Weight:
- 2.15 LBS
- MATERIAL:
- DIE-CAST
- COLOR/FINISH:
- CHROME
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- EACH
- TYPE:
- CAM
$125.61 -
DRAG SPECIALTIES Piston - Twin Cam 21988-07
DRAG SPECIALTIES
$131.79Twin Cam engines demand pistons that balance OEM reliability with measurable performance gains. This DRAG SPECIALTIES piston set delivers cast aluminum construction with a low-friction coating that reduces wear, lowers operating temperatures, and extends...09110017- SKU:
- 09110017
- Availability:
- Ships Same Business Day
- Weight:
- 2.61 LBS
- BORE SIZE IMPERIAL:
- 3.750'
- PISTON DIAMETER IMPERIAL:
- 3.750'
- PISTON MATERIAL:
- ALUMINUM
- RIDING STYLE:
- STREET
- UNITS:
- KIT
- STROKE LENGTH IMPERIAL:
- 4-3/8'
- COMPRESSION RATIO IMPERIAL:
- 9.2:1
- BORE - OVERSIZE:
- STANDARD
- BORE OVERSIZE - IMPERIAL:
- STANDARD
- PRODUCT NAME:
- PISTON
$131.79 -
DRAG SPECIALTIES Piston - Twin Cam 21930-99-005
DRAG SPECIALTIES
$153.42Twin Cam engines demand pistons engineered for high-RPM reliability and consistent performance across extended race sessions. The DRAG Specialties piston delivers the precision fit and material quality necessary to maintain ring seal integrity under...09110042- SKU:
- 09110042
- Availability:
- Ships Same Business Day
- Weight:
- 2.76 LBS
- BORE - OVERSIZE:
- +0,005'
- UNITS:
- EACH
- BORE SIZE IMPERIAL:
- 3.750'
- COMPRESSION RATIO IMPERIAL:
- 9.0:1
- PRODUCT NAME:
- PISTON
- RIDING STYLE:
- STREET
- BORE OVERSIZE - IMPERIAL:
- +0.005'
$153.42 -
DRAG SPECIALTIES Pushrod Tube Assembly - XL 72629
DRAG SPECIALTIES
$33.94Pushrod tube assemblies are critical to maintaining proper valve train geometry and preventing catastrophic engine failure. OEM-spec replacement tubes ensure your XL engine breathes correctly and maintains consistent performance across the entire RPM...DS193787- SKU:
- DS193787
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- BASE FINISH:
- CHROME
- PRODUCT NAME:
- TUBE ASSEMBLY
- TYPE:
- PUSHROD
- COLOR/FINISH:
- CHROME
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$33.94 -
DRAG SPECIALTIES Pushrod Tube Assembly - Panhead 72703
DRAG SPECIALTIES
$36.00Panhead engines demand precision-engineered pushrods that can withstand high RPM cycles and extreme combustion pressures—substandard replacements will compromise valve timing and engine reliability. The DRAG SPECIALTIES Pushrod Tube Assembly restores...DS193788- SKU:
- DS193788
- Availability:
- Ships Same Business Day
- Weight:
- 0.44 LBS
- BASE FINISH:
- CHROME
- TYPE:
- PUSHROD
- COLOR/FINISH:
- CHROME
- PRODUCT NAME:
- TUBE ASSEMBLY
- RIDING STYLE:
- STREET
- UNITS:
- EACH
$36.00 -
CUSTOM CYCLE ENGINEERING Rocker Covers - Natural FRC 2003-3
CUSTOM CYCLE ENGINEERING
$457.95Stock Panhead rocker box covers are notorious for weeping oil around their 12-bolt design—a persistent problem that plagues riders and stains garage floors. The CUSTOM CYCLE ENGINEERING Rocker Covers eliminate that frustration with a precision-engineered...09400558- SKU:
- 09400558
- Availability:
- Ships Same Business Day
- Weight:
- 6.31 LBS
- RIDING STYLE:
- STREET
- TYPE:
- ROCKER BOX
- UNITS:
- PAIR
- STYLE:
- FINNED
- COLOR/FINISH:
- NATURAL
- MATERIAL:
- 356 T-6 ALUMINUM
- PRODUCT NAME:
- COVER
$457.95 -
CUSTOM CYCLE ENGINEERING Rocker Cover - Finned - Polished - EVO CCE5833
CUSTOM CYCLE ENGINEERING
$475.95If you're running a high-performance EVO motor, your rocker covers need to do more than look good—they need to breathe, seal reliably, and clear aggressive cam profiles without compromise. The Custom Cycle Engineering finned rocker cover delivers all...09400983- SKU:
- 09400983
- Availability:
- Ships Same Business Day
- Weight:
- 3.85 LBS
- BASE FINISH:
- POLISHED
- TYPE:
- ROCKER BOX
- BASE COLOR:
- SILVER
- COLOR/FINISH:
- ALUMINUM
- COLOR/FINISH:
- POLISHED
- MATERIAL:
- ALUMINUM
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- UNITS:
- PAIR
$475.95 -
CUSTOM CYCLE ENGINEERING Top Stabilizer Link - FXD TSL 2014-2
CUSTOM CYCLE ENGINEERING
$391.95Stock motor mounts transmit excessive vibration throughout your FXD chassis, compromising both ride quality and drivetrain longevity. The CUSTOM CYCLE ENGINEERING Top Stabilizer Link replaces the rigid metal-to-metal connection with an adjustable...09330136- SKU:
- 09330136
- Availability:
- Ships Same Business Day
- Weight:
- 1.05 LBS
- COLOR/FINISH:
- BLACK
- UNITS:
- KIT
- PRODUCT NAME:
- STABILIZER
- RIDING STYLE:
- STREET
- MOUNTING POSITION:
- TOP
- TYPE:
- ENGINE
$391.95 -
CUSTOM CYCLE ENGINEERING Rocker Covers - Polished FRC 2003-2
CUSTOM CYCLE ENGINEERING
$584.95Stock Panhead rocker box covers are notorious for oil seepage that compromises engine cleanliness and requires constant maintenance. The CUSTOM CYCLE ENGINEERING Rocker Covers eliminate this problem with a precision 12-bolt design that creates a true...09400557- SKU:
- 09400557
- Availability:
- Ships Same Business Day
- Weight:
- 6.25 LBS
- UNITS:
- PAIR
- COLOR/FINISH:
- POLISHED
- PRODUCT NAME:
- COVER
- RIDING STYLE:
- STREET
- STYLE:
- FINNED
- MATERIAL:
- 356 T-6 ALUMINUM
- TYPE:
- ROCKER BOX
$584.95
